Pulp-reducing apparatus.



G. W. SHARTLE. PULP REDUCING APPARATUS. APPLICATION rum) SEPT. 28, 1912.

1,091,899, Patented Mar. 31, 191:1

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PULP REDUCING APPARATUS.

APPLIOATION FILED SEPT. 28, 1912.

Patented Mar. 31, 1914 07mm 11/6225 Sim/"Z26 Witnesses: wary/M 74.

pulp tailed away s'rnrns A PULP-REDUCING APPARATUS.

Specification of Letters Patent.

Patented Mar. 31, 1914.

Application filed September 28, 1912. Serial No. 722,804.

To all whom it may concern:

Be it known that I, CHARLES WELLS SHARTLE, a citizen of the United States, residing at Middletown, Butler county, Ohio, have invented certain new and useful Im provements in Pulp-Reducing Apparatus, of which'the following is a specification.

In the manufacture of paper it is cusprocess carried on in screening machines of well known type.

My presentinvention pertains to a system of apparatus so organized that the screening machine may run with practical continuity, notwithstanding the fact that the rough from the screening machine may requlre to be acted upon by reducing machinery working'in a discontinuous'manner.

Mypresent invention will be readily understood from the following description taken in connection with the accompanying drawings in which Figure 1. is a plan of a pulp-reducing apparatus exemplifying my invention, and Fig. 2 is a vertical longitudinal section of the same in the plane of line a of Fig. 1.

In the drawings :-1, indicates a pulpscreening machine of usual type; 2, the outlet therefrom for the pulp whichis of such degree of fineness as to have assed through the screen-plates; '3, the bee. of the screen, onto which is to be delivered, by any suitable means, the rough ul of such degree of wetness as is suitable fdr the screening operation; 4, the tail of the screen, onto which is to pass the rough pulp which is of such coarseness as to be unable to pass through the screen-plates; 5, an endless series of drag-blades of known construction arranged to drag the pulp over, the screenplates from the head to the tail of the screen; 6, a beating engine of known type, adapted to receive the rough pulp tailed off from the screen and, by operating upon that ulp after a proper length of time, to repce it to roper degree of fineness, this beating engine being adapted to receive the tailings from the screen,

the illustration showing the beating engine as being located upon a lower level than the screen, as on a lower floor of a mill, so that the tailings from the screen may flow to the beating englne by gravity; 7, a discharge pipe through which the beating engine may be'emptied of its contents; 8, a gate "in this discharge plpe; 9, a water supply pipe to deliver into the beating engine such water as may be needed in the pulp therein to fit it for proper action by the beating engine; 10, a chute adapted to deliver the tailings screen to the beating engine where gravity is depended upon to effect the delivery, as

in the particular case illustrated; 11, a trap door in the tail of the screen between the terminal end of the screen and the terminal end of screen tail 4, this trap door being preferably located very near the terminal end of the screen; 12, a tank disposed between trap door 11 and the beating engine and having, preferably, a volume considerably in excess of that of the beating engine; and 13, a valve disposed at the base of the tank and adapted to permit the discharge of the contents of the tank or a, portion.

thereof into the beating engine.

In the operation of the apparatus, in the particular form illustrated, the rough pulp, of proper wetness, goes onto the head of the screen and is dragged over the same by the H drag-blades. Pulp of proper fineness passes through the screen-platesand out through the outlet 2 for utilization or for further treatment if need be. Trap door 11 being closed, the drag-blades drag tailward, the

pulp too coarse to. pass through the screenplates, tail and thence into the beating engine through chute 10. As the pulp, in passing over the screen has not only parted with much of the finely reduced pulp but also athis coarse stufi' passing ofi of the large quantity of the water carried by'the pulp delivered to the screen, the pulp delivered to the beating engine is not sufficiently- Wet-for beating operation. To make up for this deficiency a proper amount of water is admitted to the beating engine through supply pipe 9 and the described operation is continued until the beating englne is properly filled, it being understood, of course, that the beating engine is in motion and exercising its reducing function upon the pulp whilethe pulp is being delivered into it.

The beatin engine having been properly filled with pu p and properly supplied with water, trap door 11 is to be opened, whereupon the pulp, tailed from the screen, goes into tank 13 instead of into the beating engine, it being understood that valve 13 is closed. The beating engine operates upon the pulp within it until the same is reduced to the proper degree of fineness whereupon gate 8 is to be opened and the reduced pulp dischar ed throu h )i )e .7 to some r0 er point for utilization or for further treatment if need be. i In the meantime the screen has been tailing into the tank, and, when the beating engine has been emptied and gate 8 again closed, then valve 13 is to be opened and the contents of the tanker a suificient quantity of the contents go into the beating engine to be acted upon by it in the same manner as it acted upon the tailings received by it directly from the screen. If there is a suificient quantity of pulp within the tank to properly fill the beating engine then, after the transfer, valve 18 may be closed and the tailings from the screen may continue to go to the tank through the trap door. If there be an insufiicient quantity of pulp in the tank to properly fill the beating engine then the quantity in the beatmg engine may be added to by tailings passing through the trap door and through the tank or, the trapdoor being closed, by tailings going to the beating engine through chute 10, or, in case of an insufficiency of pulp in the tank, the trap door may be closed and the beating engine may receive pulp simultaneously from the tank and from chute 10.

It will be apparent from the foregoing description that my invention consists in interposing between the screen and the beating engine or reducing mechanism a storage receptac'le and in providing means for interrupting the discharge of the screen directly to the beating engine and causing the same to discharge into said storage receptacle, and

further providing the storage receptacle with means for causing the desired portion of its contents to be discharged into the beating receptacle, thus enabling the screen to be operated continuously regardless of the amount of material being fed over the same. If there is buta small amount of Waste or coarse material being discharged from the screen, whichcan be taken care of by the beating engine, the screen is allowed to dis charge dlrectly to the beating engine. However, if the amount of coarse material is such as to exceed the capacity of the beating engine it is discharged into the storage receptacle and thence into the beating engine when the latter is ready to receive it. In this manner the screen operates continuously and where the amount of coarse mate- .rialtis'sufiicient the beating engine can operate at its full capacity practically continuously because as soon as it has been emptied it can immediately be refilled from the storage receptacle without waiting for the slower process of filling it directly from the screen. 1

I wish it to be understood that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art. 1

I claim 7 1. Pulp-reducing apparatus comprising, a horizontal screen adapted to receive rough pulp atits head end, an outlet for the passage away from the screen of such water and fine pulp as may have passed through the plates'of the screen, a series of drag-blades arranged to drag the material along over .the screen and toward its tail, a beating engine arranged to receive the material passing over the tail of the screen and to beat the received material to proper fineness, a gated outlet to permit of the beating engine being emptied after its contents are properly beaten, and means to receive the tailings from the screen after the beating engine has been properly filled from the, tail of the screen, combined substantially as set forth.

2. Pulp-reducing apparatus comprising, a horizontal screen adapted to receive rough pulp at its head end, an outlet for the passage away from the screen of such water and fine pulp asmay have passed through the-plates of the screen, a series of dragblades arranged to drag the material along over the screen and toward its tail, a beating engine-arranged to receive the material bassing over the tail of. the screen and to beat the received material to proper fineness, a gated outlet to permit of the beating engine being emptied after its contents are properly beaten,-a tank, a doored passageway leading from the tail of the screen to the tank, and a valve in the base of the tank to permit'the passage of pulp from the tank to the beating engine, combined substantially as set forth.

3. Pulp-reducing apparatus comprising,

a horizontal screen adapted to receive rough pulp at its head'end, an outlet for the passage away from the screen of suchv water and fine pulp as may have passed through the plates of the screen, a series of dragblades arranged to drag material along over the screen and toward its tail, a beating engine arranged to receive the material passing over the tail of the screen andto beat the received material to proper fineness, a chute leading from the tail of the screen to the beating en ine, a tank disposed below a tail portion 0 the screen, a doored passage at the tail of the screen between the screen-plates and said chute and adapted to deliver tailings from the screen into the tank, and a valve passage leading from the base of the tank to the beating engine, combined substantially as set forth.

4. In pulp-reducing apparatus, the combination of a screen for separating fine pulp from coarse pulp, means for passing pulp across the screen, beating engine fortreating the Waste pulp incidental to the screening process, direct means for conveying such Waste pulp from the screen to said heating engine, and indirect means for -conveying Waste pulp .from the screen to said heating engine comprising a tank having a gated inlet by which the Waste pulp may have ingress from said screen to the tank and a gated outlet by Which said Waste pulp may have egress from the tank into said beating engine. Y

5. In pulp-reducing apparatus, the combination of a beating engine, a screen, a discharge outlet for screened pulp, means for dragging pulp across the screen, a passage for tailings leading. from the screen to the beating engine, a storage tank intermediate the screen and the beating engine, a movable gate for delivering tailings from the screen to the tank, and a movable gate for delivering tailings from the tank to the beating engine.

6. The combination, with reducing mechanism, a screen for separating fine pulp from coarse pulp, said screen being arrangedto discharge directly into "said reducing mechanism, of a storage receptacle interposed between said screen and said reducing mechanism, means for interrupting the discharge of pulp from said screen directly to said reducing mechanism and causing saidpulp to be discharged directly into said receptacle, and means to discharge pulp from sa1d receptacle into said reducing mechanism.

' CHARLES WELLS SHARTLE.

Witnesses:

' H. D. MARTINDALE,

GERTRUDE BRIDGE. 

